What is Computer

 computers are all around us

from laptop computers to smartphones

to smart watches they're changing the

way that we live our lives

but have you ever asked yourself 

what exactly is a computer?

a computer is an

electronic device

that manipulates information or data

the computer sees data as ones and zeros

but it knows how to combine them into

much more complex things

such as a photo movie

website game and much more

computers use a combination of hardware

and software

hardware is any physical part of the

computer which includes the internal

components

and the external parts like the monitor

and keyboard

software is any set of instructions that

tells the hardware what to 

such as a web browser media player or

word processor when most people say

computer they're talking about a

personal computer

this can be a desktop computer or a

laptop

which has basically the same

capabilities but in a more portable

package

personal computers come in a few

different styles

the most common type uses the windows

operating system

macs or macintosh computers feature the

mac os

operating system while chromebooks run

on chrome os

smartphones and other mobile devices

mostly use the ios

or android operating systems we'll talk

more about operating systems

in a later lectures

computers come in many other shapes and

sizes

tvs game consoles and even appliances

like refrigerators can have built-in

computers

although they may not do everything a

desktop or laptop can

there is another type of computer that

plays an important role in our lives

servers a server sends information to

other computers on a network

in fact every time you use the internet

web servers deliver the web pages that

you want to see

to your computer servers are also used

in many offices

to store and share files

as you can see there are many types of

computers out there and each one plays a part in our modern world of global creating opportunities for a

better life